User's Manual

Preparing for the Installation
10
Ensure that the NCU or ACU is electrically connected to earth ground. Wear an
ESD-preventive wrist strap, ensuring that it makes a good skin contact. Connect
the clip to an unpainted surface of the chassis frame to safely channel unwanted
ESD voltages to ground. To properly guard against ESD damage and shocks, the
wrist strap and cord must operate effectively. If no wrist strap is available,
ground yourself by touching the metal part of the chassis.
Caution
For safety, periodically check the resistance value of the antistatic strap,
which should be between 1 and 10 megohm (Mohm).